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vapo(u)r /.

water vapor

/ n. mass of very small drops of liquid in the air ÕôÆû

When water boils, you can see vapor escaping from the kettle. Ë®ÕôÆø

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lock /.

/ n. Ëø

The door needs another lock.

I lost my keys so I decided to change my office lock. Õâ¸öÃÅ»¹µÃÉÏÒ»°ÑËø¡£

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engine // n. the part of a vehicle that produces power to make the vehicle move ·¢¶¯»ú£» ÒýÇæ

.

the engine of the world economy

Why has the engine stopped ÊÀ½ç¾­¼ÃµÄ·¢¶¯»ú

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Language Points

cool down: become cool or cooler ±äÁ¹£» ÀäÈ´ÏÂÀ´ .

She probably hadn¡¯t gotten over being angry; she needed time to cool down.

The machine hasn¡¯t cooled down. You shouldn¡¯t put your hands on it. ËýµÄÆø¿ÉÄÜ»¹Ã»ÓÐÏû£¬ÐèҪʱ¼äÀ侲һϡ£

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Language Points

sufficiently /.

/ ad. enough ×ã¹»µØ£» ³ä×ãµØ

I don¡¯t know him sufficiently to ask him to live in my house.

House prices are sufficiently high now to think of selling. ÎÒ¶ÔËû»¹²»¹»Á˽⣬Éв»ÄܽÐËûסµ½ÎÒ¼ÒÀ´¡£

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Language Points

dissipate /Ïûʧ

.

/ v. gradually become weaker and disappear ÏûÉ¢£»Gradually the fog dissipated as the sun came up.

His interest soon dissipated. µ±Ì«ÑôÉýÆðʱ£¬Îí½¥½¥É¢È¥¡£

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Text A5

13 Remember: Even crazy-looking problems are sometimes real and all problems seem simple when we find the solution with cool thinking.

14 Don¡¯t just say it¡¯s ¡°IMPOSSIBLE¡± without putting in a sincere effort...